Study of Hydrogen Ice Pellet Ablation During EC and NBI Heating in GAMMA-10
| Autor: | Yoshiaki Miyata, Tsuyoshi Imai, H. Kawano, Y. Yoneda, Nobuhiro Nishino, Yuta Higashizono, R. Yonenaga, M. Ito, Yousuke Nakashima, N. Morimoto, Masamitsu Noto, Masayuki Yoshikawa, Takao Ando |
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| Rok vydání: | 2009 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Hydrogen business.industry Mechanical Engineering medicine.medical_treatment digestive oral and skin physiology Cyclotron Pellets chemistry.chemical_element Plasma Electron Ablation Neutral beam injection law.invention Optics Nuclear Energy and Engineering chemistry law Pellet medicine General Materials Science Atomic physics business Civil and Structural Engineering |
| Zdroj: | Fusion Science and Technology. 55:122-126 |
| ISSN: | 1943-7641 1536-1055 |
| DOI: | 10.13182/fst09-a6996 |
| Popis: | Refueling by hydrogen ice pellet injection has been studied in various plasmas. The research of pellet ablation related to refueling is very important object. In the central-cell plasma of tandem mirror GAMMA 10, we measured the position of pellet ablation by vertical and horizontal arrays of Ha detectors and a high-speed CMOS camera. We found that the penetration depths with applying electron cyclotron heating (ECH) is shorter than that without ECH. It suggests that the pellet ablation is strongly affected by warm electrons produced with ECH. Moreover, we investigated the effects of neutral beam injection (NBI) to the pellet ablation, which showed the pellet ablation in the situation of higher density plasma. The pellets penetrate through the plasma without applying ECH or NBI. We observed the pellet ablation at each position by using vertical and horizontal arrays of Ha detectors and a high-speed CMOS camera with the interference filter. |
| Databáze: | OpenAIRE |
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